创建型 建造者模式

#include <string.h>
#include <iostream>
using namespace std;
//造房子 可以模块化构造然后组装 这里我们定义房子的基本属性  ==》目标建筑
class House
{
public:
  void setFloor(string floor){
    this->m_floor = floor;
  }
  void setWall(string wall){
    this->m_wall = wall;
  }
  void setDoor(string door){
    this->m_door = door;
  }
  string getFloor(){
    return m_floor;
  }
  string getWall(){
    return  m_wall; 
  }
  string getDoor(){
    return m_door;
  }
private:
  string   m_floor;
  string   m_wall;
  string   m_door;
};
//用构建者模型来进行管理 不同的模型可以用继承的方式管理
//构造一个产品对象，并设定不同的模块构造接口
class Builder
{
public:
  virtual void makeFloor() = 0;
  virtual void makeWall() = 0;
  virtual void makeDoor() = 0;
  virtual House *GetHouse() = 0;
  virtual ~Builder() {}
};
//不同的子类 实现不同的产品模块定制  ==》建筑师
class VillaBuild : public Builder//别墅
{
public:
  VillaBuild(){
    pHouse = new House;
  }
  ~VillaBuild()
  {
    if(pHouse != nullptr)
    {
      delete pHouse;
      pHouse = nullptr;
    }
  }
  virtual void makeFloor(){
    pHouse->setFloor("villa floor");
  }
  virtual void makeWall(){
    pHouse->setWall("villa Wall");
  }
  virtual void makeDoor(){
    pHouse->setDoor("villa Door");
  }
  virtual House *GetHouse(){
    return pHouse; 
  }
private:
  House *pHouse;
};
class FlatBuild : public Builder//公寓
{
public:
  FlatBuild(){
    pHouse = new House; 
  }
  ~FlatBuild()
  {
    if(pHouse != nullptr)
    {
      delete pHouse;
      pHouse = nullptr;
    }
  }
  virtual void makeFloor(){
    pHouse->setFloor("flat Door");
  }
  virtual void makeWall(){
    pHouse->setWall("flat Wall");
  }
  virtual void makeDoor(){
    pHouse->setDoor("flat Door");
  }
  virtual House *GetHouse(){
    return pHouse;
  }
private:
  House *pHouse;
};
//如果子类过多，产品模型过多，可以用同一个接口对其进行管理  ==》设计者
//通过具体的子类对象  构建不同的建筑类型
class Director
{
public://这里使用的对象注入的功能，将你建造的对象，通过指针传递过来，然后使用指针进行操作
  void Construct(Builder *builder)
  {
    builder->makeFloor();
    builder->makeWall();
    builder->makeDoor();
  }
};
int main()
{
  //设计师提供建筑模板类 可以自己定制不用这个类
  Director * director = new Director();
  //根据需要定制要创建的目标建筑 建筑师创建
  Builder * builder = new VillaBuild();
  //直接通过建筑模板（类似工厂方法进行创建）
  director->Construct(builder);
  //获取建造结果 进行查看
  House * house = builder->GetHouse();
  cout<<"VillaBuild floor:"<<house->getFloor()<<endl;
  cout<<"VillaBuild wall:"<<house->getWall()<<endl;
  cout<<"VillaBuild door:"<<house->getDoor()<<endl;
  if(builder != nullptr)
  {
    delete builder;
    builder = nullptr;
  }
  //创建另一种类型的建筑
  builder = new FlatBuild();
  //通过模板进行构建 ==》设计师
  director->Construct(builder);
  house = builder->GetHouse();
  cout<<"FlatBuild floor:"<<house->getFloor()<<endl;
  cout<<"FlatBuild wall:"<<house->getWall()<<endl;
  cout<<"FlatBuild door:"<<house->getDoor()<<endl;
  if(builder != nullptr)
  {
    delete builder;
    builder = nullptr;
  }
  if(director != nullptr)
  {
    delete director;
    director = nullptr;
  }
  return 0;
}